WO1998046403A1 - Process for impregnating solid bodies - Google Patents
Process for impregnating solid bodies Download PDFInfo
- Publication number
- WO1998046403A1 WO1998046403A1 PCT/EP1998/002134 EP9802134W WO9846403A1 WO 1998046403 A1 WO1998046403 A1 WO 1998046403A1 EP 9802134 W EP9802134 W EP 9802134W WO 9846403 A1 WO9846403 A1 WO 9846403A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- impregnating agent
- wood
- impregnation
- oil
- container
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/36—Aliphatic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/44—Tar; Mineral oil
- B27K3/48—Mineral oil
Definitions
- the invention relates to an impregnating agent and a method for impregnating solid bodies such as wood, in particular track supports consisting of wood or having wood, with an impregnating agent which is liquid during the impregnation, the solid body being arranged in a container, the container then under reduced pressure (fore-vacuum). applied and then the impregnating agent is introduced into the solid at overpressure (impregnation process).
- the cavities in a porous, solid body are filled with at least one liquid agent.
- the penetration of the pores, insofar as they are open to the surface, is caused by capillary forces and pressure differences. It is therefore necessary to remove all gases from the solid and from the impregnating agent itself before impregnation.
- the solid to be impregnated is exposed to a pre-vacuum.
- the effect of the impregnating agent is further enhanced if the solid body is flooded by the impregnating agent in a container such as a boiler and kept under excess pressure.
- Wooden sleepers, masts, pits or timber can be impregnated with salt solutions, tar oils and other solvent-based substances to provide protection against putrefaction and animal pests.
- Coal tar oils in high-boiling fractions to prevent fungal attack have proven particularly useful for wooden sleepers.
- the ripping or double ripping method is used as a savings drink.
- AI linseed oil is emulsified with mineral oil in order to then achieve water solubility by adding surfactants. Insecticides can then be added to the emulsion.
- a vegetable oil is used according to DE 22 54 146 AI.
- wood is treated by means of a preservation process in which the wood is soaked under pressure with simultaneous heat treatment in a solution of one or more metal salts of a carboxylic acid in an organic or aqueous solvent.
- the impregnated wood is then heated to fix the metal salts.
- the present invention is based on the problem of further developing an impregnating agent and a method of the type mentioned at the outset such that solid bodies, in particular track supports made of wood or track supports containing wood or other wooden components, are effectively protected against fungal attack and against animal pests with high efficiency without there is a significant environmental impact.
- the problem is solved with an impregnating agent for impregnating wood, in particular wood intended for track supports, using biocides and / or siccatives and / or organic copper compounds which can be stored in the wood via a carrier liquid, which is characterized in that the Carrier fluid is undiluted, unemulsified and undissolved, non-synthetic oil that is hardened by autoxidation.
- the use of solvents for impregnating wood is avoided, which would result in an undesirable environmental impact.
- the use of the non-synthetic oil that hardens in the wood ensures that the biocides, siccatives or copper compounds are stored in the wood to the required extent without the need for further process steps such as heat treatments in addition to the usual pressure treatments.
- the hardening carrier material causes the substances causing the impregnation to immolilize, which ensures that even after a long period of use, rinsing does not take place.
- the problem is solved in that after the forevacuum has been built up, the container is filled with inert gas and then kept under excess pressure, and then the solid body is subjected to excess pressure in the container and in the presence of the inert gas with the impregnating agent consisting of a non-curing agent in the presence of the inert gas undiluted, unemulsified and undissolved non-synthetic oil as a carrier liquid and this biocides and / or even siccatives and / or organic copper compounds added, then the pressure degraded and to remove superfluous impregnating agent from the impregnated solid by building up a post-vacuum.
- the impregnating agent consisting of a non-curing agent in the presence of the inert gas undiluted, unemulsified and undissolved non-synthetic oil as a carrier liquid and this biocides and / or even siccatives and / or organic copper compounds added
- Physically and / or chemically curing natural products are used as carrier liquid, in particular linseed oil and / or rapeseed oil and / or fish oil and / or soybean oil and / or parrafins. Glycerides and / or optionally plastics that polymerize for curing could also be used.
- biocides and / or siccatives and / or the organic copper compounds may be necessary to introduce the biocides and / or siccatives and / or the organic copper compounds into the otherwise solvent-free carrier liquid by means of a solubilizer.
- the teaching according to the invention cures the impregnating agent which does not contain liquid solvents during the impregnation after the impregnation process in the solid body, in particular wood, the immobilized biocides being immobilized. This creates the desired impregnation effect.
- the hardening further ensures that the impregnating agent cannot be rinsed out even after a long period of use. Because the impregnating agent is cured in the solid, there is also the advantage that the electrical conductivity is extremely low.
- the soaking agent is pumped out and the volume of the container released is filled with inert gas. It is preferably provided that there is still an overpressure in the container after the impregnating agent has been drained. Then the inert gas pumped out to build up a negative pressure in the container again over a period of time t 3 , as a result of which excess impregnating agent is released from the solid body and the latter is pumped off.
- the period t 3 is preferably approximately 2 t 2 to 5 t 2 .
- the solid body itself should be soaked at a temperature T, with 50 ° C ⁇ T, ⁇ 140 ° C.
- the temperature at which excess impregnating agent is released from the solid body and then pumped out should be at a temperature T 2 , preferably T 2 2 / 2/3 T.
- Siccatives should be added to the impregnating agent itself in order to accelerate the autoxidation and / or polymerization.
- the desiccants can consist of an active metal cation such as cobalt, lead or manganese and an anion of an organic acid (higher fatty acids, resin acids, naphthenic acids).
- an organic acid higher fatty acids, resin acids, naphthenic acids.
- substances with organic copper compounds are used as desiccants. These copper compounds are said to act as siccatives and as biocides.
- one or more other fungicides can also be used. Copper octoate should preferably be mentioned.
- nitrogen or carbon dioxide is preferably used as the inert gas.
- a cuboid solid with the dimensions 10 x 10 x 150 cm 3 made of hardwood lumber, crack-free, with little knots and with a wood moisture content ⁇ 30% is placed in a pressure vessel in order to impregnate it by saving water.
- the pressure vessel is then filled with inert gas in the form of nitrogen.
- a gas pressure of approximately 4 bar is set.
- the time period in which the fore vacuum prevails is approximately equal to the time period in which the inert gas is pressurized to the pressure vessel.
- the forevacuum can be applied for 10 to 20 minutes and the overpressure between 15 and 25 minutes. If necessary, this gas exchange is repeated.
- the pressure vessel is then filled with undissolved, unemulsified, undiluted linseed oil, which is mixed with biocides and siccatives.
- the solid body is completely covered with the impregnating agent.
- a pressure of between 7 and 10 bar is built up in the pressure vessel.
- the temperature of the impregnating agent is set to approximately 110 to 100 ° C.
- the impregnating agent is pumped off, the volume released Pressure vessel is filled with inert gas. Care should be taken to ensure that there is always an overpressure in the pressure vessel while the impregnating agent is being pumped off, preferably in the range between 2 and 5 bar.
- the inert gas is pumped off and a negative pressure (post-vacuum) is set in the pressure vessel over a period of about 20 to 30 minutes in order to release and pump off excess impregnating agent from the wood.
- a negative pressure post-vacuum
- the temperature in the pressure vessel should be around 60 to 90 ° C.
- the pressure / time course of the watering-down impregnation can be seen in principle in FIG. 1.
- the pre-pressure phase following the fore-vacuum phase before the impregnating agent is introduced into the pressure vessel under high pressure it should be noted that this has the advantage that a gas cushion is formed in the wood by the excess impregnating agent present in the wood in the post-vacuum phase can be driven out in a simple manner.
- the impregnation is not influenced by the stored gas cushion, since the stored inert gas is used on the one hand to release excess impregnating agent in the final vacuum phase and on the other hand cannot cause autoxidation or polymerization of the impregnating agent.
- a both cylindrical and cuboid section of a softwood is impregnated in the full impregnation process, which can be seen in principle in FIG. 2, in which the pressure is also logarithmically plotted against the impregnation time.
- a pressure of ⁇ 100 mbar is built up in it.
- the pressure vessel is then filled with inert gas in the form of carbon dioxide and then impregnating agent in the form of undiluted, unemulsified and undissolved soybean oil in order to introduce the impregnating agent at a pressure of approximately 10 bar.
- the coniferous wood After the coniferous wood has been impregnated with the impregnating agent for a period of approx. 180 min, it is drained off and a post-vacuum is built up in the pressure vessel in order to remove and suction off excess impregnating agent from the coniferous wood.
- the duration or the pressure of the impregnating agent is set so that the softwood is impregnated with an amount of approximately 400 to 600 kg of impregnating agent per m 3 of sapwood.
- Sapwood is the juice-bearing and soakable area of the wood.
- heartwood is like this for pine and oak is generally not impregnable.
- Coniferous cuboidal outer geometry is impregnated with sunflower oil using the savings watering method (Fig. 1). Nitrogen was used as the inert gas.
- the fore-vacuum, pre-pressure, pressure and post-vacuum phases roughly correspond to those of Example 1. It was found that about 180 to 240 kg of impregnating agent was absorbed per m 3 of sapwood.
- a pulsation method for impregnating hardwood cuboid outer geometry will be explained.
- the wood to be impregnated is placed in a container in which a vacuum is initially built up over a time X 0 .
- An overpressure is then built up, which is maintained over a period of time X.
- the container of the impregnating agent ie the carrier liquid consisting of undissolved, unemulsified, undiluted linseed oil, is filled with biocides and siccatives as additives in order to reduce the pressure to a value P 2 of, for example Absolutely increase 7 to 10 bar.
- This pressure is maintained over a period of time X 3 , in order then to drop the pressure to the value P, which prevails when the container is filled with impregnating agent.
- This pressure is kept in the container for a time X 2 , which corresponds approximately to the time X 3 at the beginning of the impregnation.
- the period of time in which the coniferous wood is exposed to the high pressure P 2 is increased, whereas the period of time during which the pressure P, approximately 4 to 6 bar absolute, is kept largely constant.
- the time span X 2 or X 4 can be about 0.5 to 3 minutes, the time span X 3 in about 0.5 to 3 minutes and the time span X 5 8 to 15 minutes with a total impregnation time of about 180 to 240 minutes.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU75241/98A AU7524198A (en) | 1997-04-16 | 1998-04-11 | Process for impregnating solid bodies |
AT0904398A AT408084B (en) | 1997-04-16 | 1998-04-11 | METHOD FOR IMPREGNATING WOODEN TRACKS OR WOODEN TRACKS |
PL98336272A PL185350B1 (en) | 1997-04-16 | 1998-04-11 | Impreganting agent and method of impregnating solid bodies |
DE19880454T DE19880454D2 (en) | 1997-04-16 | 1998-04-11 | Impregnating agent and method for impregnating solids |
LU90459A LU90459B1 (en) | 1997-04-16 | 1999-10-13 | Impregnating agent and method for impregnating solid bodies |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19715664A DE19715664A1 (en) | 1997-04-16 | 1997-04-16 | Process for impregnating solids |
DE19715664.9 | 1997-04-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1998046403A1 true WO1998046403A1 (en) | 1998-10-22 |
WO1998046403B1 WO1998046403B1 (en) | 1998-12-17 |
Family
ID=7826555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/002134 WO1998046403A1 (en) | 1997-04-16 | 1998-04-11 | Process for impregnating solid bodies |
Country Status (6)
Country | Link |
---|---|
AT (1) | AT408084B (en) |
AU (1) | AU7524198A (en) |
DE (2) | DE19715664A1 (en) |
LU (1) | LU90459B1 (en) |
PL (1) | PL185350B1 (en) |
WO (1) | WO1998046403A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001024982A1 (en) * | 1999-10-07 | 2001-04-12 | Järlåsa Färgindustrier AB | Method of impregnation |
RU2777340C1 (en) * | 2021-12-13 | 2022-08-02 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный лесотехнический университет имени Г.Ф. Морозова" | Composition for hydrophobization and preservation of wood |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19852827A1 (en) * | 1998-11-17 | 2000-05-18 | Menz Martin | Wood preservation process |
AUPQ141899A0 (en) * | 1999-07-05 | 1999-07-29 | Quantum Extracts Pty Ltd | A method of and composition for preserving cellulosic material |
AUPR211400A0 (en) * | 2000-12-15 | 2001-01-25 | Koppers-Hickson Timber Protection Pty Limited | Material and method for treatment of timber |
DE10160424A1 (en) * | 2001-12-08 | 2004-02-19 | Jan Nies | Impregnation assembly for fresh and newly-cut wood logs, comprising pressure-tight container with inner underpressure and heater to flush wood constantly with agent to displace residual moisture with full penetration |
US7900052B2 (en) | 2002-11-06 | 2011-03-01 | International Business Machines Corporation | Confidential data sharing and anonymous entity resolution |
FR2906493B1 (en) * | 2006-09-28 | 2012-10-12 | Pierre Fenneteau Bois | PROCESS FOR TREATING WOOD, DAMPING PROCESSING IN OIL. |
US8204831B2 (en) | 2006-11-13 | 2012-06-19 | International Business Machines Corporation | Post-anonymous fuzzy comparisons without the use of pre-anonymization variants |
FR2927564B1 (en) * | 2008-02-14 | 2012-01-13 | Ct Valorisation Ind Agro Ressources | PROCESS FOR TREATING WOOD WITH AGENTS OF NATURAL ORIGIN |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1181246A (en) * | 1967-04-28 | 1970-02-11 | Hager Ab | Improvements in or relating to Methods of Treating Wood |
GB1512549A (en) * | 1975-11-26 | 1978-06-01 | Hager Ab | Process for the treatment of wood |
GB2088422A (en) * | 1980-11-05 | 1982-06-09 | Hager Bror Olof | Surface treatment of wood |
US4371572A (en) * | 1979-10-10 | 1983-02-01 | Hager Bror O | Process for the treatment of wood |
US4942067A (en) * | 1989-03-27 | 1990-07-17 | Harding Norman T | Wood preservative and method for preserving wood |
WO1992019429A1 (en) * | 1991-05-07 | 1992-11-12 | Ulrich Herbert Schirnig | Method of quality improvement of wooden articles, such as improved preservation of the wood through impregnation thereof |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2105806A1 (en) * | 1971-02-08 | 1972-08-17 | Peper, Heinrich, 2801 Fischerhude | Impregnating plant - for porous solid materials esp wood |
DE2254146C3 (en) * | 1972-11-04 | 1975-09-04 | Imchemie Kunststoff Gmbh, 5678 Wermelskirchen | Method for increasing the strength of a porous body |
DE3043659A1 (en) * | 1980-11-19 | 1982-07-08 | Bror Olof 18263 Djursholm Häger | Timber treatment e.g. waterproofing, protection against fungi - by drying surface and treating with warm oil in vacuo |
US4649065A (en) * | 1985-07-08 | 1987-03-10 | Mooney Chemicals, Inc. | Process for preserving wood |
NZ226187A (en) * | 1988-05-25 | 1991-08-27 | Ikeda Nobuo | Impregnating wood with liquid in pressure tank: portion of liquid passed through monitoring units to determine completion |
CH681440A5 (en) * | 1990-04-26 | 1993-03-31 | Warmoctro Bv | |
AT396569B (en) * | 1991-04-25 | 1993-10-25 | Theuermann Manfred | DEVICE FOR SPLITING WOOD |
DE4204941A1 (en) * | 1992-02-19 | 1993-08-26 | Ruetgerswerke Ag | Fixation of chromium-free wood preservatives - by evacuation and then pressurisation with acid gas |
JP2557780B2 (en) * | 1993-01-19 | 1996-11-27 | 株式会社マキノン | Method and apparatus for injecting treatment liquid into wood and porous inorganic material, and method for breaking radial soft cell wall and closed wall pores of wood |
-
1997
- 1997-04-16 DE DE19715664A patent/DE19715664A1/en not_active Withdrawn
-
1998
- 1998-04-11 AT AT0904398A patent/AT408084B/en not_active IP Right Cessation
- 1998-04-11 DE DE19880454T patent/DE19880454D2/en not_active Expired - Lifetime
- 1998-04-11 AU AU75241/98A patent/AU7524198A/en not_active Abandoned
- 1998-04-11 WO PCT/EP1998/002134 patent/WO1998046403A1/en not_active Application Discontinuation
- 1998-04-11 PL PL98336272A patent/PL185350B1/en not_active IP Right Cessation
-
1999
- 1999-10-13 LU LU90459A patent/LU90459B1/en active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1181246A (en) * | 1967-04-28 | 1970-02-11 | Hager Ab | Improvements in or relating to Methods of Treating Wood |
GB1512549A (en) * | 1975-11-26 | 1978-06-01 | Hager Ab | Process for the treatment of wood |
US4371572A (en) * | 1979-10-10 | 1983-02-01 | Hager Bror O | Process for the treatment of wood |
GB2088422A (en) * | 1980-11-05 | 1982-06-09 | Hager Bror Olof | Surface treatment of wood |
US4942067A (en) * | 1989-03-27 | 1990-07-17 | Harding Norman T | Wood preservative and method for preserving wood |
WO1992019429A1 (en) * | 1991-05-07 | 1992-11-12 | Ulrich Herbert Schirnig | Method of quality improvement of wooden articles, such as improved preservation of the wood through impregnation thereof |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001024982A1 (en) * | 1999-10-07 | 2001-04-12 | Järlåsa Färgindustrier AB | Method of impregnation |
AU754796B2 (en) * | 1999-10-07 | 2002-11-28 | Linotech Ab | Method of impregnation |
AU754796C (en) * | 1999-10-07 | 2003-06-26 | Linotech Ab | Method of impregnation |
RU2777340C1 (en) * | 2021-12-13 | 2022-08-02 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Воронежский государственный лесотехнический университет имени Г.Ф. Морозова" | Composition for hydrophobization and preservation of wood |
Also Published As
Publication number | Publication date |
---|---|
LU90459B1 (en) | 1999-10-25 |
PL185350B1 (en) | 2003-04-30 |
DE19715664A1 (en) | 1998-10-22 |
ATA904398A (en) | 2001-01-15 |
DE19880454D2 (en) | 2000-03-30 |
AU7524198A (en) | 1998-11-11 |
PL336272A1 (en) | 2000-06-19 |
AT408084B (en) | 2001-08-27 |
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